The theoretical research of the dependable database concentrates on the multi-layer safe database, access controlling, database encoding, channel control and so on.
安全数据库的理论研究主要集中在多级安全数据库、访问控制、数据库加密与推理通道控制等领域。
The medium access control Technology focuses on multi-address access, that is, how to coordinate users sharing a common channel to achieve efficient and reliable transmission.
媒体接入控制技术的核心问题是如何协调多个用户共用一个信道实现高效可靠传输，即多址接入问题。
To solve low channel utilization problem caused by long propagation delay in wireless networks, a fast reservation on-demand transmission (FRODT) medium access control (MAC) protocol is proposed.
为解决无线网络中长传播时延所带来的信道资源利用率低的问题，提出一种基于快速预约按需发送（FRODT）的媒质接入控制（MAC）协议。
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